<table>
<tr><td>
    <a href="#">Info
        <div class="tooltipcontainer">
            <div class="tooltip">Here some info</div>
        </div>
    </a>
			<div>asdfasdf</div>
</td></tr>
</table>

<style>
td .tooltipcontainer {
    position: relative;
}
td .tooltip {
    display: none;
    position: absolute;
    /* More positioning, heigh, width, etc */
}
td a:hover .tooltip {
    display: block;
}
</style>